Vacatur Required When a Preliminary-Injunction Dispute Becomes Moot Before the District Court Rules

1. Introduction

Case: Ryan Castaneira v. C. Fox (3d Cir. Aug. 4, 2026) (not precedential).
Parties: Ryan Castaneira (pro se appellant) sued the Chair of the Pennsylvania Parole Board and several Pennsylvania parole agents (appellees).
Background: After Castaneira’s Georgia convictions and a sentence including a lengthy probation term, Georgia transferred probation supervision to Pennsylvania under the Interstate Compact for Adult Offender Supervision. Pennsylvania officials later added a “no-contact with minors” condition (absent written approval).

Key issues on appeal: Whether the District Court properly denied a preliminary injunction on the merits, and whether intervening events (termination of Pennsylvania supervision after a Georgia modification order) mooted the injunction request before the District Court ruled.

2. Summary of the Opinion

The Third Circuit vacated the District Court’s order denying the preliminary injunction on the merits and remanded with instructions to deny the preliminary-injunction motion as moot. The panel relied on extra-record evidence showing that, while the motion was pending, Georgia placed Castaneira on non-reporting status and Pennsylvania consequently terminated (“closed interest” in) its supervision—eliminating any need for injunctive relief against Pennsylvania officials regarding probation conditions.

3. Analysis

3.1. Precedents Cited

  • Nutrasweet Co. v. Vit-Mar Enters., Inc., 112 F.3d 689 (3d Cir. 1997)
    Used to clarify appellate jurisdictional limits: the denial of a temporary restraining order (“TRO”) is generally unappealable. The panel therefore confined the appeal to the preliminary-injunction ruling.
  • Reilly v. City of Harrisburg, 858 F.3d 173 (3d Cir. 2017)
    Cited for the proposition that the court had interlocutory appellate jurisdiction under 28 U.S.C. § 1292(a)(1) to review denial of a preliminary injunction.
  • In re Application of Adan, 437 F.3d 381 (3d Cir. 2006) (abrogated on other grounds by Golan v. Saada, 596 U.S. 666 (2022))
    Central to the panel’s ability to address mootness: the Third Circuit may consider new evidence on appeal in exceptional circumstances, including developments that render requested injunctive relief moot or otherwise alter its appropriateness. The opinion also uses Adan to deny appellees’ attempt to use Fed. R. App. P. 10(e)(2) to add new evidence, emphasizing that Rule 10(e)(2) corrects inadvertent omissions rather than introducing genuinely new evidence.
  • Blanciak v. Allegheny Ludlum Corp., 77 F.3d 690 (3d Cir. 1996)
    Provides the governing mootness principle: if developments prevent a court from being able to grant requested relief, the matter must be dismissed as moot. The panel applied this to conclude the preliminary-injunction request had become moot before the District Court ruled.
  • Lara v. Comm'r Pa. State Police, 125 F.4th 428 (3d Cir. 2025)
    Cited for the “capable-of-repetition-yet-evading-review” exception, specifically the requirement that the challenged action is too short in duration to be fully litigated before it ends. The panel rejected the exception because Castaneira’s probation runs to 2039, leaving ample time to litigate if supervision and the challenged conditions were reimposed.
  • Hartnett v. Pa. State Educ. Ass'n, 963 F.3d 301 (3d Cir. 2020) and United States v. Grape, 549 F.3d 591 (3d Cir. 2008)
    Used to reject the voluntary-cessation exception. The cessation here resulted from a Georgia court modification order—not a unilateral choice by Pennsylvania defendants—so the concern that defendants could simply “resume at any time” was not the driver of mootness.
  • Forestal Guarani S.A. v. Daros Int'l, Inc., 613 F.3d 395 (3d Cir. 2010)
    Supports the court’s decision not to reach appellees’ broader, merits-adjacent jurisdictional argument (Rooker-Feldman) in this limited interlocutory appeal, leaving it for the District Court to consider first.

3.2. Legal Reasoning

The opinion’s logic is procedural and remedial rather than merits-driven:

  1. Material change during pendency: While the preliminary-injunction motion was pending, Georgia modified probation to “non-reporting,” and Pennsylvania “closed interest,” terminating its supervision.
  2. Effect on requested relief: Because the requested injunction targeted Pennsylvania officials’ enforcement of probation conditions, termination of Pennsylvania supervision meant there was no effective injunctive relief the federal court could grant against those officials with respect to those conditions at that time.
  3. Appellate consideration of extra-record evidence: The Third Circuit treated the new evidence as properly considered on appeal under the exceptional-circumstances principle recognized in In re Application of Adan, while simultaneously rejecting Rule 10(e)(2) as the mechanism for adding new evidence.
  4. Mootness required a different disposition: Because the motion was moot before the District Court ruled, the District Court should not have denied it “on the merits.” The proper corrective step was to vacate the merits denial and remand for denial as moot.
  5. Exceptions rejected: The panel rejected (a) capable-of-repetition-yet-evading-review because there would be ample time to litigate given the long probation term, and (b) voluntary cessation because the cessation flowed from a Georgia court order, not a unilateral act by defendants.

3.3. Impact

Although labeled “NOT PRECEDENTIAL,” the decision is instructive on recurring federal-courts practice points in injunction litigation:

  • Correct disposition when mootness predates the ruling: The opinion reinforces that a merits ruling on a moot injunction request is improper and should be unwound on appeal via vacatur and remand for a mootness disposition. This protects Article III limits by preventing advisory adjudication on interim relief.
  • Appellate handling of post-judgment factual developments: The panel highlights a pragmatic route for addressing mootness based on later-arising facts, while drawing a clear line between (i) considering new evidence for mootness and (ii) “supplementing” the record under Rule 10(e)(2).
  • Guidance for probation/interstate compact contexts: When supervision authority changes hands (or ends) under interstate arrangements, requests to enjoin enforcement by a particular jurisdiction’s officials can become non-justiciable quickly. Parties should promptly notify the district court of such developments to avoid unnecessary merits rulings and appeals.
  • Constraining mootness exceptions: The opinion’s application of Lara, Hartnett, and Grape underscores that speculative future reimposition of conditions does not, by itself, satisfy “evading review,” and that voluntary cessation typically requires defendant-driven change.

4. Complex Concepts Simplified

  • Preliminary injunction: A temporary court order entered early in a case to prevent harm before final judgment. It is forward-looking and depends on the court’s ability to provide effective relief.
  • Interlocutory appeal (28 U.S.C. § 1292(a)(1)): An appeal allowed before the case ends, specifically for certain injunction orders (including denials of preliminary injunctions).
  • Mootness: A case (or request) is moot when a court can no longer grant effective relief because circumstances have changed. Federal courts generally must dismiss moot matters because they no longer present a live controversy.
  • Vacatur: An appellate court’s action nullifying a lower-court order. Here, vacatur removed a merits ruling that should not have been entered once the matter became moot.
  • Capable-of-repetition-yet-evading-review: A narrow exception to mootness for actions too short to litigate fully before they end, and likely to happen again to the same party. The court found the “too short” requirement unmet.
  • Voluntary cessation: Another mootness exception preventing defendants from ending challenged conduct to avoid review and then resuming it later. It generally focuses on defendant-driven, unilateral changes—absent here because a Georgia court order drove the change.
  • Fed. R. App. P. 10(e)(2): A rule to correct the appellate record when something from the district court record was inadvertently omitted; it is not a vehicle to introduce new evidence never presented below.
  • Rooker-Feldman doctrine: A jurisdictional doctrine limiting federal district courts from acting as de facto appellate courts reviewing certain state-court judgments. The Third Circuit declined to decide its applicability in this interlocutory posture.

5. Conclusion

Castaneira v. Fox stands for a clear procedural rule: when intervening events eliminate the court’s ability to grant the requested preliminary injunctive relief before the district court rules, the injunction request is moot, and any merits denial should be vacated and replaced with a mootness disposition. The opinion also clarifies how appellate courts may consider post-record developments to resolve mootness while rejecting Rule 10(e)(2) as a method for injecting new evidence into the record. Even as a nonprecedential disposition, the decision offers a disciplined template for handling injunction appeals in rapidly changing supervision and enforcement contexts.